Core box for concrete floors



Sept. 9, 1924. j 1,507,721

G. B. WAITE CORE BOX FOR CONCRETE FLOORS Filed Dec. 9. 1921 j! j- Il we; au

Patented Sept. 9, 1924.v

UNITED STATEs-l ens: B. WAITE, or NEW Yoan, N. Y.

' coen Boxroa concentra: rLooa's.y

Application filed December 9, l1921.71Se1ia`1l No. 521,091.A y

To all whom it may concern.'

Be. 't known that I, GUY B. VA'rrn, citi-H zen ofthe United States, residing at New York,- inthe borough of Manhattan and State of New York,z have invented certain new and.. useful" Improvements in Core- Boxesl for .Concrete Floors, jof which the..

following is a specification.

This invention relates to improvements l in core-boxes .for concrete ioors aindfp-articularly ofthe type `which permanently re` main in the finished doors to form hollow spaces to. lessen the weight of the floors having long spansl and which` must be. of

considerable thickness to sustain theloads.

Various methods have beenA resorted to in forming hol'lows int-he central '.p-artsfof the. ioor's, or those 'parts which have little value in` thick floors, and on account of specialized labor demanded' in buildingeonstriletions, itV present;v methods" has been .found that .the are very expensive.

This invention is for thev purpose of avoiding the use of" several kinds of. eX pensive labor, by constructing the scoreboxes ina mannerwhich will permit .the molding of the 'ceiling on the underside of the Hoor at the sailnet-.time the floor and*y beams labove .are being formed, or in other words, forming theloor', beams and ceiling in one'general operation: n V f The objects of this invention are attained by themeans illustrated inthe accompany-l ing drawing, in which Fig. l is] a view in verticalcrosssection A of a portion of afloor of a certain 'construc-v tion. Fig. 2 is a horizontal sectionalview of'the'form of fioor shown in Fig. 1. f Fig;

3 isadetail perspective view ofyone ofthe core-boxes. 4 isa verticalcross-sectional view of a modified :form: of lthe floor.r Fig.. 5 isfa view similar to Fig;v 4, showing a further modified form of floor. Figli,

is a horizontal cross-section of one of the core-boxes. Figi?, is a' detail sectional view of one corner of a core-box.. Fig. 8

is a detail view showing a modified form of` supporting foot, and Fig. 9 is a view showing a modified form of core-box.

Similar referencev numerals in all of the gures of the drawing designate like parts.

This improved core-box is adapted to.`

be used in either one-way or 'two-way floors, that is, either having the beams all running in one direction only, or running in both directions across the span. In the drawing is 'illustrated the two-Way t tion, excepting*Figurev 9,1which shows one.

end of a core-box for use in. one-way'floors..

. Thecore-boxes are preferably constructed of metahand for thef two-way ifl'oor are Vformed rectangular 1n cross-sect1onhavmg thefour vertical'sides :10, the topedges of which are turned outwardly to yiorm .the

top-'flanges 11, and. whose lower edges V.arev bent.v inwardly to form. lthe 'bottom flangesv 1'2', said bottomeiiangesheing shortenthan o the lengthv ofthe sides, so that thel sidesof Vthe boxes. at .the corners canv beextended to aapoint belowthegfbottom-flanges toform '1 feet 13. which are preferably fpointed to" engage` in the wooden ce11tei'ingwvhich-is primarily erected to support vthe vforms and pointed feet ycan `be formed riritegral with the Vsides fof the .box and formed with double points-"asshown in Figi 3,'or `they can be formed 'integralwithy the'sides and ywith a singleV point, las shown in Fig.-7,1or they can be` formed separatelyfrom .the sides4 vof the boit' and bev riveted in place, as shown the Vfloor while .l it.V is being'for-med-.f The` 'IISV soi in Fig-48, of the:` drawing. @Between the feet 'and "beneath, the bottom flangesy are f formed thef openings-or. open spaces 14;, which are. Iadap-tedvto permit. l the Y concrete to ooze under the bottom Vflanges to form the ceilingwportion ofv the ioorfwhich lies l l beneath the ycore-boxes. The bottom-flanges form' reinforcing ribs for the vbottom edges j of thesides, andY the top-iianges form vrev90l inforcing rib-smfor the topv edges and also a'. suitable` support'for` ai cover 15, 'which I might be of concrete,-as lshown in, Figs.' 1

and- 4', or.I mayzbe 'of "metal or other fiatv material, as shown -atlGgin Fig; 5; The sides ofy `he core-boxes are preferably corrugated; adjacent the corners, as-.shown 1 at 1 f 17, and the'oorrugations arev preferably cl'eepe I l er at their-lower ends, so thatthepleats thus formed Willgiyea taper tov the boxeswhich will permitf them terbe.nestedl onewithirithe other for shipping purposesand practically form rectangular supporting legs of' the corners' extending substantially the full` height of the boxes. It is further contemplatedtok use reinforcing wires 18, which are* preferably connected to the feet of the boxes below the bottom flanges 12, so` that, when bedded therein. i l

The top and bottom-ianges, the lvertical y the ceiling is formed',these wires will beiml corrugations, and the wires 18, permit the use of relatively light weight material from which thefboxes can be formedl` and where the material used is extra light weight, the..

separately made feet are desirable.

In constructing a floor, the centering 19 is first erected as is done in other systems,

then the core-boxes are placed in position;

These boxes stand up from the-centering far enough'to permit the concrete to ooze beneath the bottom-flanges, and the tops of the boxes are preferably left open or; uncovered, so that whenv necessary somel of the con-y crete material can be poured on the interior of the boxes. to be sure the ceiling portion within the area of the boxes is of sufhcient thickness. After the ceiling portion has been poured, then the tops or covers 15 can be placed in position, and. then the ribs or beams of theloor are ypouredvto complete The tops or covers V15 are prefas shown on Fig. 1, but should the covers be relatively thin, whether "of .concrete Aor other material, then the concrete is poured over the covers to a sufficient thickness to form a floor thick enough to support the stresses, as shown lin Figs. et and 5.

As shown in IFig. 5, where a thin metal cover is used, the vtop edges ofthe boxes are bent to form pockets 21 to receive the covers and to prevent their accidental dis- W' placement.

. It is understood, that when the boxes are positioned upon the bare 'centering planks, the teeth*y at the botto-m of the feet are caused to slightly enter the material of the centering to positively positionv them and hold them in position while the being poured 'or'inserted Having thus fully described the invenco-ncrete is tion, what is claimed is 1. A oore-box for concrete floor icon- 'structions adapted to be embedded and remain inthe floor, said box being formed with inclined sides having top-flanges bent outwardly to permit nesting of the .boxes during shipment,and bottom-flanges bent inwardly, and legs provided with= teeth at their lower edges to retain the boxes in position upon temporary centering while the concrete is being poured.

2. A core-box for concrete floor constructions. adapted to be embedded and remain in the floor, said box being formed open at the top and bottom and having horizontal reinforcing flanges at both the top and bottom edges, the top lange extending outwardly rom the box, a detachable coverl for the open top having a depending portion toextend slightlyinto the top of the box, penetrating means at the lower edges of thebox which will support the bottom edges above the temporary een! tering used during 1 construction and bite into the centering to retain they box in, position while the concrete is being po-ured.

3. A core-box Vfor concrete floor con: structions adaptedto be embedded and remain in the floor, said box having an open top and botto-1n and reinforcedy legs 'atthe corners formed by `inwardly extending pleats adjacent the corners, said pleats being tapered downwardly and inwardly to also taper the box, a detachable coverfor the open top,'penetrating means yatfthe lower ends ofy the legs to support the bot- 1 tom edges' of the box 4above the temporary centering used during construction and .to positively retain the box yin position on the centeringk poured.

4. A core-box for concrete hoor conf structions adaptedtobe embedded andl remain in the loor,fsaid box having' anlopen top and bottom provided with pleats lad-l jacent the corners to form the box-tapered with reinforcing legs at the-corners, said legs having pointedfends'projecting below the bottom edges ofthe box, a detachable cover for the open,top,"reinforcing 'wires' extending from side to side of the -box 'below the bottom edges'rthereo-f, saidpointed ends adapted to support thebotto'm edges of the box above the temporaryA centering used during construction and positively rewhile -the concrete is 'being A tain the box in kposition onthe centering while the floor is being constructed.y -x

In testimony whereof` I aiix my sign-a-l ture.` s I 

